Who was the Blessed Virgin Mary's guardian angel?

Catholic teaching is that "Every one of the faithful has his own special guardian angel from baptism. (*Sent. certa.*)" (Ludwig Ott II ch. 3 §30.2; cf. Matt 18:10 : "See that you despise not one of these little ones: for I say to you, that their angels in heaven always see the face of my Father who is in heaven."). According to Catholic theologians or mystics, who was the Blessed Virgin Mary's guardian angel? St. Gabriel the Archangel?